Commit aa5b7d11 authored by Michael Kelley's avatar Michael Kelley Committed by Wei Liu
Browse files

video: hyperv_fb: Add ratelimit on error message 



Due to a full ring buffer, the driver may be unable to send updates to
the Hyper-V host.  But outputing the error message can make the problem
worse because console output is also typically written to the frame
buffer.  As a result, in some circumstances the error message is output
continuously.

Break the cycle by rate limiting the error message.  Also output
the error code for additional diagnosability.

Signed-off-by: default avatarMichael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/1618933459-10585-1-git-send-email-mikelley@microsoft.com


Signed-off-by: default avatarWei Liu <wei.liu@kernel.org>
parent 77db0ec8

drivers/video/fbdev/hyperv_fb.c

+1 −1
Original line number Diff line number Diff line
@@ -308,7 +308,7 @@ static inline int synthvid_send(struct hv_device *hdev, 
			       VM_PKT_DATA_INBAND, 0);



	if (ret)

		pr_err("Unable to send packet via vmbus\n");

		pr_err_ratelimited("Unable to send packet via vmbus; error %d\n", ret);



	return ret;

}